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Power factor of a coil is 0.707 at frequency 60 Hz. If frequency changes to 120 Hz, then what will be the power factor?

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Power factor of a coil is 0.707 at frequency 60 Hz. If frequency changes to 120 Hz, then what will be the power factor?

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Power factor of coil (cos ϕ) = 0.707
Frequency (f1) = 60Hz
Frequency (f2) = 120Hz
By the formula,

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